How many people live in Peoria County, IL?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 179,600 people living in Peoria County, IL. That makes Peoria County the 12th-most populous county in Illinois. It is home to 1.4% of people living in the state.
180K
population of Peoria County, IL (2024)
1.4%
County share of the Illinois population (2024)
About 179,600 people lived in Peoria County, IL in 2024.
Population estimates, 2000–2024
What are Peoria County, IL’s age demographics?
About 33,800 Peoria County, IL residents are aged 65 and older in 2024. That represents 18.8% of its population. For comparison, the age group represents 17.9% of Illinois’s population and 18% in the US overall.
Another 42,900 Peoria County residents, or 23.9% of the population, were children under 18. For comparison, the age group represents 21.2% of Illinois’s population and 21.6% in the US overall.
A higher share of Peoria County, IL's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Peoria County, IL’s racial and ethnic demographics?
Non-Hispanic white residents make up 66% of the Peoria County population, higher than the national share of 57.5%. Peoria County also has a larger share of people identifying as non-Hispanic Black or African American (19.3%) than the US overall (12.6%).
In contrast, Peoria County’s Hispanic population accounts for 6.5%, below the 20% nationwide, and the non-Hispanic Asian population makes up 4.8% of the county, compared with 6.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Peoria County, IL has a higher share of a non-Hispanic white population than Illinois as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Peoria County, IL is Peoria with about 96,600 residents in 2024.
Cities and towns in Peoria County, IL ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Peoria (pt.) | 96,579 |
| 2. | Peoria (pt.) | 7,825 |
| 3. | Chillicothe (pt.) | 6,052 |
| 4. | Bartonville (pt.) | 5,823 |
| 5. | Peoria Heights (pt.) | 5,802 |
| 6. | Peoria (pt.) | 5,145 |
| 7. | West Peoria (pt.) | 4,185 |
| 8. | Peoria (pt.) | 2,147 |
| 9. | Elmwood | 2,041 |
| 10. | Bellevue | 1,903 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
